Just one day after a $2.6 million diamond necklace went missing from a party at the Hôtel du Cap-Eden-Roc, near Cannes, the film festival’s most dazzling stars returned to the scene of the suspected crime for amfAR’s Cinema Against aids gala on Thursday. There, they presumably held onto their metallic clutches extra tightly as they demonstrated creative new ways of baring flesh. For Sharon Stone, this meant accessorizing her bare back with a gilt snake ornament, while Brazilian model Isabeli Fontana chose a black gown with circular cutouts. Karlie Kloss and Janet Jackson went in the other direction, opting for sexy pantsuits—perhaps a more practical look for potential getaways from Cannes cat burglars. Below, the day’s most alluring looks.